Today Jonathan Roberts wrote about Fedora TV. Here is a small script to add video/audio item into an existing rss channel file. The code is not clean and without much error checking , it requires some item(s) to be already present in the file. Use it like
./tvitem -f fedora-tv.xml
It will ask input for Title, link , description and a local path to the file which will help it to calcualte the size of the file.